body {
    font-family: Arial, sans-serif;
    background-color: #f2f2f2;
}

.container {
    display: flex;
}

.sidebar {
    width: 200px;
    background-color: #f5f5f5;
    padding: 20px;
}

.sidebar ul {
    padding: 0;
    list-style: none;
}

.sidebar li {
    margin-bottom: 10px;
}

.sidebar a {
    display: block;
    padding: 10px;
    text-decoration: none;
    color: #333;
    transition: background-color 0.3s ease-in-out;
}

.sidebar a:hover {
    background-color: #ddd;
}

.content {
    flex-grow: 1;
    background-color: #fff;
    padding: 20px;
}

h1 {
    text-align: center;
    margin-top: 0;
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
}

.user-info img {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    margin-bottom: 10px;
}

.user-info .username {
    font-weight: bold;
    margin-bottom: 5px;
}

.user-info .logout-btn {
    background-color: #4CAF50;
    color: #fff;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out;
}

.user-info .logout-btn:hover {
    background-color: #45a049;
}

h2 {
    text-align: center;
    margin-top: 0;
}

.filter-form {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.filter-form input[type="text"],
.filter-form input[type="number"] {
    width: calc(50% - 10px);
    padding: 5px;
    margin-bottom: 10px;
}

.filter-form input[type="button"] {
    background-color: #4CAF50;
    color: #fff;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out;
}

.filter-form input[type="button"]:hover {
    background-color: #45a049;
}

.book-list {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    list-style-type: none;
    padding: 0;
    margin-bottom: 10px;
}

.book-list input[type="button"]{
    background-color: #6c95d3;
    color: #fff;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    transition: background-color 0.3s ease-in-out;
}

.book-item {
    border: 1px solid #ccc;
    padding: 10px;
    text-align: center;
}